DISCOVERY
USA J 99Sail number USA/IRL3990
GPH
623.8
OSN
604.8
LOA
9.95 m
Displacement
3875 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.6516
Medium
0.8809
High
1.0001
Triple Offshore
Low
0.841
Medium
1.0852
High
1.2165
Boat Specifications
Dimensions
- Length overall
- 9.95 m
- Beam
- 3.41 m
- Draft
- 2.1 m
- Displacement
- 3875 kg
- Crew weight
- 573 kg
- Wetted surface
- 22.87 m²
Sails
- Mainsail
- 32.93 m²
- Genoa
- 25.42 m²
- Spinnaker
- 0 m²
- Asymmetric spinnaker
- 100.92 m²
Design
- Type
- J 99
- Builder
- J Composites
- Designer
- Al Johnstone
- Year built
- 2018
- Stability index
- 116.5
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 5.06 | 5.35 | 5.57 | 5.81 | 5.9 | 5.75 | 5.16 | 4.39 |
| 8 | 6.04 | 6.33 | 6.54 | 6.85 | 6.96 | 6.86 | 6.39 | 5.52 |
| 10 | 6.7 | 6.88 | 7.03 | 7.29 | 7.48 | 7.41 | 7.13 | 6.48 |
| 12 | 7.03 | 7.19 | 7.33 | 7.49 | 7.95 | 7.94 | 7.61 | 7.07 |
| 14 | 7.19 | 7.38 | 7.62 | 7.68 | 8.29 | 8.49 | 8.15 | 7.4 |
| 16 | 7.26 | 7.49 | 7.86 | 8.01 | 8.57 | 8.98 | 8.74 | 7.75 |
| 20 | 7.31 | 7.57 | 8.11 | 8.6 | 9.07 | 9.72 | 10.4 | 8.56 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 42.9° | 3.31 | 144.2° | 3.8 |
| 8 | 41.4° | 4.03 | 147.8° | 4.78 |
| 10 | 40.6° | 4.61 | 148.8° | 5.61 |
| 12 | 38.4° | 5 | 150.5° | 6.12 |
| 14 | 37.8° | 5.16 | 151.1° | 6.42 |
| 16 | 37.6° | 5.22 | 174.8° | 6.93 |
| 20 | 37.5° | 5.29 | 174.8° | 7.65 |
Loading polar chart…